Remove implicit dependencies.

dart/pkg/compiler/lib/src/js_backend/backend.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of js_backend;
 
 const VERBOSE_OPTIMIZER_HINTS = false;
 
 const bool USE_CPS_IR = const bool.fromEnvironment("USE_CPS_IR");
 
@@ skipping 931 matching lines @@
       // TODO(ngeoffray): Should we have the resolver register those instead?
       Element e = findHelper('boolConversionCheck');
       if (e != null) enqueue(world, e, registry);
     }
 
     if (TRACE_CALLS) {
       traceHelper = findHelper('traceHelper');
       assert(traceHelper != null);
       enqueueInResolution(traceHelper, registry);
     }
+
+    // TODO(ahe): Don't know who uses this class, but it wasn't correctly
+    // enqueued after we stopped compiling the @proxy constant eagerly.
+    world.registerInstantiatedClass(
+        interceptorsLibrary.findLocal('JSUInt31'), registry);

[ahe, 2015/02/18 16:30:56]

I have an hypothesis: the ++ and -- operators.

+
     registerCheckedModeHelpers(registry);
   }
 
   onResolutionComplete() {
     super.onResolutionComplete();
     computeMembersNeededForReflection();
     rti.computeClassesNeedingRti();
     computeFunctionsToAlwaysInline();
   }
 
@@ skipping 1415 matching lines @@
     return findHelper('mainHasTooManyParameters');
   }
 
   void forgetElement(Element element) {
     constants.forgetElement(element);
     constantCompilerTask.dartConstantCompiler.forgetElement(element);
     aliasedSuperMembers.remove(element);
   }
 
   void registerMainHasArguments(Enqueuer enqueuer) {
+    // The first argument could be a list of strings.
+    enqueuer.registerInstantiatedClass(
+        listImplementation, compiler.globalDependencies);
+    enqueuer.registerInstantiatedClass(
+        stringImplementation, compiler.globalDependencies);
+
     // If the main method takes arguments, this compilation could be the target
     // of Isolate.spawnUri. Strictly speaking, that can happen also if main
     // takes no arguments, but in this case the spawned isolate can't
     // communicate with the spawning isolate.
     enqueuer.enableIsolateSupport();
   }
 
   /// Returns the filename for the output-unit named [name].
   ///
   /// The filename is of the form "<main output file>_<name>.part.js".
@@ skipping 289 matching lines @@
   }
 }
 
 /// Records that [constant] is used by the element behind [registry].
 class Dependency {
   final ConstantValue constant;
   final Element annotatedElement;
 
   const Dependency(this.constant, this.annotatedElement);
 }